Echeveria plant named ‘TSAECH1910’

ABSTRACT

A new and distinct  Echeveria  plant named ‘TSAECH1910’ which is characterized by an abundance of narrowly oblanceolate, dark yellow-green foliage that is tightly held in a compact stemless rosette, foliage that becomes progressively suffused with dark greyed-purple on the abaxial surface, foliage that is distally margined and tipped with dark greyed-purple on the adaxial surface, and the stability of these characteristics from generation to generation.

Latin name of the genus and species: The Latin name of the genus andspecies of the novel variety disclosed herein is Echeveria agavoides.

Variety denomination: The inventive variety of Echeveria disclosedherein has been given the variety denomination ‘TSAECH1910’.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims priority to the Community Plant Variety Rightsapplication number 2019/2218, filed Sep. 12, 2019, which is hereinincorporated by reference.

BACKGROUND OF THE INVENTION

Parentage: ‘TSAECH1910’ is a seedling selection resulting from the openpollination of a plurality of cultivated unnamed Echeveria agavoidesplants (not patented) In the spring of 2014, seed harvested from saidEcheveria agavoides plants was sown at a commercial greenhouse inHeerhugowaard, the Netherlands and allowed to grow to maturity forobservation. In the summer of 2015, one seedling resulting from the openpollination was observed to exhibit unique growth and foliagecharacteristics and was isolated for further evaluation in order toconfirm the distinctness and stability of the characteristics firstobserved. Upon confirmation of distinctness and stability, ‘TSAECH1910’was selected for commercialization.

Asexual Reproduction: Asexual reproduction of the new cultivar‘TSAECH1910’, by way of rooting leaf cuttings, was first initiated inthe spring of 2016 at the inventor's commercial greenhouse inHeerhugowaard, the Netherlands. Through four subsequent generations, theunique features of this cultivar have proven to be stable and true totype.

SUMMARY OF THE INVENTION

The cultivar ‘TSAECH1910’ has not been observed under all possibleenvironmental conditions. The phenotype may vary somewhat withvariations in environment such as temperature, day length, and lightintensity, without, however, any variance in genotype. The followingtraits have been repeatedly observed and are determined to be the uniquecharacteristics of ‘TSAECH1910’. These characteristics in combinationdistinguish ‘TSAECH1910’ as a new and distinct Echeveria cultivar:

-   -   1. ‘TSAECH1910’ exhibits an abundance of narrowly oblanceolate        succulent foliage which is tightly held in a compact, stemless        rosette; and    -   2. ‘TSAECH1910’ exhibits dark yellow-green foliage that is        slightly to moderately glossy; and    -   3. ‘TSAECH1910’ exhibits an adaxial foliage surface which is        distally margined and tipped dark greyed-purple; and    -   4. ‘TSAECH1910’ exhibits an abaxial foliage surface which        becomes progressively suffused with dark greyed-purple towards        the apex.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 illustrates, as nearly true as it is reasonably possible to makethe same in color photographs of this type, an exemplary plant of‘TSAECH1910’ grown in a commercial greenhouse in Heerhugowaard, theNetherlands. This plant is approximately 12 months old, shown planted inan 17 cm container.

FIG. 2 illustrates, as nearly true as it is reasonably possible to makethe same in color photographs of this type, the typical foliagearrangement of ‘TSAECH1910’.

FIG. 3 illustrates, as nearly true as it is reasonably possible to makethe same in color photographs of this type, the adaxial surface of thejuvenile and mature foliage of ‘TSAECH1910’.

FIG. 4 illustrates, as nearly true as it is reasonably possible to makethe same in color photographs of this type, the abaxial surface of themature foliage of ‘TSAECH1910’.

BOTANICAL DESCRIPTION OF THE PLANT

The following observations and measurements made in January of 2020describe averages from a sample set of six specimens of 12 months old‘TSAECH1910’ plants grown in 17 cm nursery containers at a commercialgreenhouse in Heerhugowaard, the Netherlands. Plants were produced usingconventional greenhouse production protocols for Echeveria plants whichconsisted of minimal irrigation and fertilizer applications, andchemical pest and disease control measures against mealy bug andBotrytis as required. Plants were grown under approximately 50 percentshade after propagation and later exposed to full sun once they began tomature. No photoperiodic treatments or artificial light was given to theplants.

Those skilled in the art will appreciate that certain characteristicswill vary with older or, conversely, with younger plants. ‘TSAECH1910’has not been observed under all possible environmental conditions. Wheredimensions, sizes, colors and other characteristics are given, it is tobe understood that such characteristics are approximations or averagesset forth as accurately as practicable. The phenotype of the variety maydiffer from the descriptions set forth herein with variations inenvironmental, climatic and cultural conditions. Color notations arebased on The Royal Horticultural Society Colour Chart, The RoyalHorticultural Society, London, 2015 (sixth edition).

A botanical description of ‘TSAECH1910’ and comparisons with the parentplants and closest known comparator are provided below.

-   Plant description:    -   -   Growth habit.—Succulent perennial with foliage growing in a            stemless basal rosette.        -   Plant shape.—Flattened.        -   Height from soil level to top of foliar plane.—10.5 cm.        -   Plant spread.—Average of 19.6 cm.        -   Growth rate.—Moderately fast growing.        -   Plant vigor.—Moderately vigorous.        -   Propagation.—Type — Leaf cuttings. Time to initiate rooting            — Approximately 21 days at 18 degrees Celsius. Crop time —            Approximately 35 weeks to produce a marketable plant in an            11 cm container.        -   Disease and pest resistance or susceptibility.—More            resistant to insect pests known to infest Echeveria spp.; no            more or less tolerant or resistant to pathogens known to            infect Echeveria spp.        -   Environmental tolerances.—Adapt to, at least, USDA Zones 10            to 12 and temperatures as high as 40 degrees Celsius;            moderate tolerance to rain yet drought tolerant once            established; high tolerance to wind.-   Root system:    -   -   General.—Fine, well-branched fibrous roots.-   Foliage:    -   -   Arrangement.—Rosette.        -   Division.—Simple.        -   Attachment.—Sessile.        -   Quantity.—Approximately 150 leaves per rosette.        -   Shape.—Oblong to slightly oblanceolate.        -   Dimensions.—8.0 cm long, 2.3 cm wide, and 0.9 cm thick, on            average.        -   Aspect.—Very slightly concave and slightly curved upwards.        -   Attitude.—Both juvenile and mature foliage are held upright            at an average angle of 20 degrees from vertical; innermost            whorls are held more upright while outermost whorls are            slightly more relaxed.        -   Apex.—Apiculate.        -   Base.—Long cuneate.        -   Margin.—Entire; not undulated.        -   Pubescence, texture and luster of the adaxial            surface.—Glabrous and smooth; slightly glossy with the            exception of the proximal portion towards the base which is            moderately glossy; moderately glaucous.        -   Pubescence, texture and luster of the abaxial            surface.—Glabrous, smooth, and moderately glossy.        -   Color.—Juvenile foliage, adaxial surface — Nearest to in            between green and greyed-green, RHS 138A and 191A, and            fading to a lighter shade of yellow-green towards the base,            nearest to RHS 145A; tipped greyed-purple, nearest to RHS            183D; the epicuticular wax covering the leaf surface is            greyed-green, nearest to RHS 198B. Juvenile foliage, abaxial            surface — Nearest to in between yellow-green and            greyed-green, RHS 191B and 191A, and fading to a lighter            shade of yellow-green towards the base, nearest to RHS 148D;            tipped greyed-purple, nearest to RHS 183D. Mature foliage,            adaxial surface — Nearest to in between yellow-green and            green, RHS 147B and 137B, and fading to a lighter shade of            yellow-green towards the base, nearest to in between RHS            148C and 148D; distally margined and tipped greyed-purple,            nearest to RHS 187A; the epicuticular wax covering the leaf            surface is greyed-green, nearest to RHS 198B. Mature            foliage, abaxial surface — Yellow-green, nearest to in            between RHS N148B and N148C, and fading lightly towards the            base, nearest to RHS N148D, and becoming progressively more            suffused with greyed-purple towards the apex, nearest to a            mixture of RHS N186C and 187A.        -   Venation.—No venation is visible.        -   Petiole.—No petiole; leaves are sessile.-   Inflorescence: No flowering has been observed to date.

COMPARISONS WITH THE PARENT PLANT AND CLOSEST KNOWN COMPARATOR

Plants of the new cultivar ‘TSAECH1910’ differ from the parents, unnamedand unpatented Echeveria agavoides plants, in the followingcharacteristics described in Table 1 below.

TABLE 1 Unnamed Echeveria Characteristic ‘TSAECH1910’ agavoides plants.Foliage width. Narrower than the Broader than parents. ‘TSAECH1910’.General Darker yellow-green Lighter yellow-green, and coloration of andmore heavily more lightly suffused with the foliage. suffused withgreyed- greyed-purple on the purple on the abaxial abaxial surface.surface.

COMPARISONS WITH THE CLOSEST KNOWN COMPARATOR

Plants of the new cultivar ‘TSAECH1910’ differ from the closest knowncommercial comparator, the common form of the species Echeveria‘Sagitta’ (U.S. Plant Pat. No. 26,231), in the following characteristicsdescribed in Table 2 below.

TABLE 2 Characteristic ‘TSAECH1910’ ‘Saggita’ Foliage width. Narrowerthan Broader than ‘Saggita’. ‘TSAECH1910’. General coloration Darkeryellow-green Lighter yellow-green, and of the foliage. and more heavilymore lightly suffused with suffused with greyed- greyed-purple on thepurple on the abaxial abaxial surface. surface. General coloration Morebroadly and More narrowly and of the adaxial conspicuouslyinconspicuously margined foliage margins, margined with withgreyed-purple. greyed-purple.

That which is claimed is:
 1. A new and distinct variety of Echeveriaplant named ‘TSAECH1910’, substantially as described and illustratedherein.